Nameserver with Custom Hostname

[konfused]

I know of cases where one machine hosts various services including a
name server, but the Hostname is unique and not NSx or DNSx.  However
Internic believes the machine name is NSx.thedomain.top.

How is this accomplished?  Do the DNS records use NSx throughout the
files and an A or CNAME for the friendly machine name?  Or is the other
way around, and the records us the friendly name while an A or CNAME is
used to map to NSx?

Can anyone demonstrate how this is possible with a simple example
record?  I've read that a CNAME or A name cannot be used.

Thank you kindly,

confused.







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